BMW Coolant Expansion Tanks for BMW E36 (1992-1998) M3

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On certain models, namely E36, E46, and E90, the factory BMW expansion tank is prone to either breaking at connection points or blowing apart altogether. If you're starting to feel like your expansion tank is on borrowed time, it's probably time to replace with either a direct OE replacement, or strengthen your cooling setup with an aluminum expansion tank - we offer numerous performance upgrades for your expansion tank. Especially if you're someone who likes to track your BMW, we recommend upgrading your expansion tank to avoid ruining your track day.
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OEM Mahle-Behr Coolant Expansion Tank - E36/E39/Z3 6 cylinder 1992-1998
OEM Mahle-Behr Coolant Expansion Tank - E36/E39/Z3 6 cylinder 1992-19...
Mahle-Behr - Corporate Logo
T#:341101
Part#: 17111723520
Ships in 3 Business Days
$ 99.99 USD
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$ 99.99 USD
Free Shipping on orders $49 and up
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Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.
E36 Mishimoto Black Aluminum Coolant Expansion Tank
E36 Mishimoto Black Aluminum Coolant Expansion Tank
Direct fitment with the Mishimoto fan shroud. Modification may be required with the OEM shroud.
Mishimoto - Corporate Logo
T#:383861
Part#: MMRT-E36-92EBK
In Stock
$ 195.99 USD
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$ 195.99 USD
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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it. Mishimoto provides a one time fix for this issue with their new aluminum expansion tank. Features: Constructed from aluminum to prevent future cracking Multi function aluminum dipstick w/ knurled head Utilizes factory mounting points, hardware, and sensor (s) Can be used with either Mishimoto or OEM radiator And of course this product come with Mishimoto's lifetime warranty WARNING! Prog 65 may apply to this product.Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm.For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
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Mishimoto Essentials Bundle - BMW E36 3
Mishimoto Essentials Bundle - BMW E36 3
Mishimoto - Corporate Logo
T#:51039948
Part#: MMB-E36-001
Ships in 3 Business Days
New Item
$ 1,150.99 USD
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$ 1,150.99 USD
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Each part in this bundle is selected to improve the E36's fluid dynamics and thermal stability.
OEM Behr Coolant Expansion Tank Cap 2.0 Bar - E36 E46 E34 E39 E32 E38 E65 X3 X5 Z4
OEM Behr Coolant Expansion Tank Cap 2.0 Bar - E36 E46 E34 E39 E32 E38...
Mahle-Behr - Corporate Logo
T#:2766
Part#: 17111742231
Ships in 4 Business Days
$ 20.99

This product was last offered at the strikethrough price on
09-10-2026

$ 19.99 USD
Free Shipping on orders $49 and up
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$ 19.99 USD
Free Shipping on orders $49 and up
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This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

This item fits the following BMWs:
1990-1991 E30 BMW 318i 318is 318ic
1992-1998 E36 BMW 318i 318is 318ic 323is 323ic 325i 325is 325ic 328i 328is M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
1989-1995 E34 BMW 530i 535i 540i M5
1991-1995 E34 BMW 525i
1997-2003 E39 BMW 525i 528i 530i 540i M5
1989-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li
1990-1998 E31 BMW 840i 840ci 850i 850ci 850csi
2004-2011 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2000-2006 E53 BMW X5 30.0i X5 4.4i X5 4.6is X5 4.8is
1996-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Coupe M Roadster
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si M Roadster M Coupe
2000-2003 E52 BMW Z8 Z8 Alpina
2007+ E90 BMW 335i & 335xi
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